Anti-icing fluid is a specialized liquid used primarily in aviation to prevent the formation of ice on aircraft surfaces. It is applied before takeoff to ensure that ice does not accumulate on wings, tail, or other critical areas, which can affect flight safety and performance. This fluid works by lowering the freezing point of water, allowing it to remain in a liquid state even in cold temperatures. Anti-icing fluids are typically made from propylene glycol or ethylene glycol and are designed to be effective in various weather conditions, ensuring safe operations during winter months.